Improvement in flour-bolts



B. SLATER.

Flnur Bolts Patented Dec FIG-.1.

UNITED STATES PATENT Darren.

CHARLES E. SLATER, or BLAnoHnsrnn, OHIO.

IMPROVEMENT IN FLOUR-BOLTS.

Specification forming part of Letters Patent No. 133,805, dated December 10, 1872.

Nature and Objeetsof the Invention. This is an improvement on those siftingbolts whose cloth is stretched arounda cylin-' drical reel, composed of longitudinal splines or ribs; and said improvement consists essentially in the provision upon said ribs of a series of projections, which support longitudinal rods or wires against which only the cloth impinges in such a manner as to permit the application of a continuous bolting-cloth, the effective bolting-surface being thereby materially enlarged, besides being almost en- General Description.

Figure 1 is a perspective view of a boltingreel embodying my improvements.

being detached therefrom. Fig. 3 shows, by transverse section a portion of my improved reel to a larger scale. Fig. 4 is a still more enlarged section of my improved reel-rib.

A represents my improved reel-frame, the peripheries of whose splines or ribs B have proj ections 0 instead of the customary plain or flush surface. These projections may either form a part of the substance of the rib or may consist of separate pieces of any suitable substancesuch as iron coated withzinc or tin. These projections are arranged spirally on the reelframe so that no projection shall occupy the same orbital path as those immediately precedin g and followingit. This spirality may be, as in Fig. 2, such as to place the projections of either rib midway between those of the preceding and following ribs, or the spirality may be such as to give each individual projection a separate and distinct orbit from any other. Each. projection has a rounded outer edge, e, and has a groove, 0, to receive a me-' 7 .tallic rod or wire, D, whose ends may be firmly secured in the heads E of the reel. These Fig. 2 is a side elevation of the. reel-frame, the cloth rods of iron or other oxidizable metal are protected by zinc, tin, or nickel. Around the reel thus constituted the cloth F is secured by stitching to the said rods D. The outermost of the ribs are beveled, as at b, to enable the easy escape of any flour passing between the rods. The round of the outer edges 0 of the projections is such as to relieve them from any contact with the cloth.

Pads or caps G, of wash-leather or cloth, may be introduced between the projections and the cloth, so as to inclose and protect the rods at those parts, and these caps may be secured by suitable cement.

Several decided advantages accrue from this improvementfor example, the comparatively small area of contact of the bolt and the rods afiord no lodgment for particles of flour and ofl'al, such as, under the present system, accumulate upon the ribs, and absorbing moisture operate to rot the cloth and harbor worms, dust, &c.; and I thus also avoid the disturbance of the reels equilibrium from unequal accumulations thereupon.

The efi'ective service of the bolt is increased and the flour, instead of being gathered in windrows, which clog the meshes of the cloth at every rib, has free and'unrestricted passage in every direction, even between the ribs and the cloth.

I do not claim, broadly, constructing the ribs of the reel with projections so as to leave spaces between the ribs and the cloth. Neither do I claim, broadly, supporting the cloth by supplementary longitudinal ribs. I am aware that each of these inventions, separately considered, is old.

Claims.

I claim as new and of my invention- 1. The combination of the ribs B, the projections O, and the metallic rods D, arranged for the application of a continuous bolting cloth, in the manner and for the purposes set forth. I

2. The alternating arrangement of the projections O 0 upon the successive ribs B, in

combination with rods D, substantially as explained.

In testimony of which invention I hereunto 

